The Baltimore County State’s Attorney’s Office on Tuesday said Gladden has been charged as an adult with 29 counts related to the shooting of a classmate -- nine counts of attempted murder, nine counts of first-degree assault, nine counts of reckless endangerment, one count of use of a firearm in the commission of a crime of violence and one count of carrying a weapon on school property.

The shooting happened around 10:45 a.m. on Aug. 27 inside the school's cafeteria, injuring 17-year-old Daniel Borowy. Borowy has been upgraded from critical to serious condition, according to officials at Shock Trauma.

Officials said based on the evidence known to date, Gladden’s father, Robert Gladden Sr., will not be charged with a crime. Gladden Jr. sometimes stayed at his father’s home.

Officials said while it is alleged that Robert Gladden Jr., a minor, obtained the gun used in this crime from his father’s house, Maryland law requires proof that the gun was accessible and loaded at the time the minor had access.

Andrew Piper, Gladden Jr.'s stepfather, who Gladden Jr. lived with, remains charged with possession of a weapon by a prohibited person, officials said. Despite the charge, the evidence is that all the guns located in the Piper household were locked in a safe, officials said.

Officials said Gladden Jr. will likely be arraigned in the next 30 to 60 days, at which time a trial date will be set.

A bail hearing has not yet been scheduled.

Stay with WBAL-TV 11 News at 5 p.m. and wbaltv.com for the latest on this developing story.